Island



(No Model.)

P. W. 'sBA-BURY. DENTAL VULGANIZER.

No. 443,699. Patented Dec. 30, 1890.

[JE/INJUR- UNITED STATES PATENT OFFICE.

FREDERICK IV. SEABURY, OF PROVIDENCE, RHODE ISLAND.

DENTAL VU LCANIZER.

SPECIFICATION forming part of Letters Patent No. 443,699, dated December30, 1890.

Application tiled April 25, 1890. Serial No. 349,425. (No model.)

To all whom it may concern:

Be it known that I, FREDERICK W. SEA BURY, of the city of Providence,county of Providence, and State of Rhode Island, have invented a new anduseful Improvement in Dental Vulcanizers; and I hereby declare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the accompanying drawings, forming part of thisspecification.

This invention has reference to an improvement in vulcanizers adaptedfor dentists use; and it consists in the peculiar` and novelconstruction of the parts, as will be more fully set forth hereinafter.

Figure 1 is a front view of my improved vulcanizer. Fig. 2 is aside viewof the same. Fig. 3 is a vertical section, and Fig. 4 is a horizontalsection, of the same on a line immediately above the flask shown in Fig.3.

Similar numbers of reference indicate corresponding parts.

In the drawings, the nu mberG indicates the cylindrical mantle slightlyconical, so as to be of greater diameter at the lower than at the upperend. The mantle is supported on the legs 7, thus leaving an open spacebelow the lower edge of the mantle. The upper part of the mantle isprovided with the holes S 8. The mantle 6 forms the support of andsurrounds the greater part of the oven 9, which oven is constructed to tinto the space formed in the mantle to receive the oven and rest on thetop of the mantle.

The oven consists of the bottom 10, the portion of which that occupiesthe central space in the mantle, which when in use is directly over thegas-burner or other source of heat, is made convex on the under side andthicker than the U-shaped sides 11 of the oven shown in the horizontalsection in Fig'. et. One side of t-he oven is provided with the door 12,connected by the hinges 13 on one side and by the latch 14 on theopposite side. The opening closed by the door 12 is the full width ofthe oven. The top of the oven' has the flange 15, projecting beyond thesame. The oven is supported by the ange 15, resting on the top of themantle 6, and by the sides and bottom of the oven, which fit into thespace left in the mantle to receive it. The oven is cast in one piece,and to facilitate the molding thereof its width is greater at thedoor-opening than it is at any other point. The top of the oven isprovided with the screws 1G and the thermometer 17. By the peculiar formof the oven, having the flaring tangential sides ending in thesemicircular side opposite the door, as is shown in the horizontalsection, Fig. 4, and the large door 12, the dental flask 18 can bereadily inserted and withdrawn, and can be so accurately placed that thescrew or screws by which the upper part of the flask is forced downduring the process of heating or vulcauization to accurately form to themold the material treated will bear on the upper part ,Of the askuniformly and' in the desired place or places, so as to bear with therequired force on the flask. The peculiar form and construction of themantle and the oven also permit of the construction of a durable anduseful dental vulcanizer requiring little machine work or skilled labor.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. A dental vulcanizer consistln g of a castmetaloven U-shaped in horizontal section, one side of which is closed by adoor and provided with a projecting liange nearits upper end and amantle surrounding the greater part of the oven and supporting the same,as described.

3. The combination, with the oven 9, U- shaped in horizontal section,the door 12, and the top 15, forming a projecting flange, the top of theoven provided with the screw or screws 1G and thermometer 17, of themantle 6, formed to receive and partially surround and support the oven,as described.

3. The combination, in adental vulcauizer, of' an oven the top of whichis provided with clamping-screws and with a projecting rim, the verticalsides of the oven being semicircular on one side, the two adjoiningsides forming straight tangential walls, and the ends of these oppositethe semicircular side of the oven forming a lateral opening closed witha door, with a mantle partially surrounding the oven and forming asupport for the same, as described.

FREDERICK 1V. SEABURY.

Witnesses:

M. F. BLGH,

J. A. MILLER, Jr.

IOC

